Year	Percent
1950	10.09224
1955	9.69197
1960	9.38971
1965	8.97441
1970	11.5415
1975	11.54989
1980	10.80219
1985	11.83968
1990	11.56414
1995	11.89983
2000	12.63539
2005	13.02092
2010	12.86365
2015	12.46798
2020	11.27994
2025	9.92467
2030	9.26743
2035	9.35035
2040	9.43881
2045	9.2614
2050	8.62051
2055	7.79513
2060	7.25542
2065	7.15399
2070	7.27544
2075	7.29163
2080	7.03992
2085	6.60858
2090	6.25204
2095	6.13124
2100	6.18433